6778911 has 8 divisors (see below), whose sum is σ = 9153280. Its totient is φ = 4461912.

The previous prime is 6778861. The next prime is 6778921. The reversal of 6778911 is 1198776.

6778911 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6778911 - 2¹³ = 6770719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6778911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14065 + ... + 14538.

It is an arithmetic number, because the mean of its divisors is an integer number (1144160).

Almost surely, 2^6778911 is an apocalyptic number.

6778911 is a deficient number, since it is larger than the sum of its proper divisors (2374369).

6778911 is a wasteful number, since it uses less digits than its factorization.

6778911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28685.

The product of its digits is 21168, while the sum is 39.

The square root of 6778911 is about 2603.6341908955. The cubic root of 6778911 is about 189.2575922689.

The spelling of 6778911 in words is "six million, seven hundred seventy-eight thousand, nine hundred eleven".